Affiliation:
1. Key Laboratory of Stars and Interstellar Medium, Xiangtan University , Xiangtan 411105 , People’s Republic of China
2. Physics Department, Xiangtan University , Xiangtan 411105 , People’s Republic of China
Abstract
Abstract
An MK-like spectral classification has been conducted for 1224 hot subdwarf stars with LAMOST DR9 low-resolution spectra. The whole sample was divided into four categories according to the spectral line characteristics: He-normal, He-weak, He-strong C, and He-strong. Each selected spectrum was assigned a spectral class, a luminosity class, and a helium class by comparing the line depth and width with standard spectra selected in LAMOST. Relationships between atmospheric parameters and spectral classification are also presented.
Funder
National Natural Science Foundation of China
Scientific Research Foundation of Hunan Provincial Education Department
CAMS
CAS
Chinese Academy of Sciences
National Development and Reform Commission
National Astronomical Observatories, Chinese Academy of Sciences
Publisher
Oxford University Press (OUP)